Syr Carah, the Bold — ruling 1

If Syr Carah or an instant or sorcery spell you control deals damage to two or more players at the same time, Syr Carah's first ability triggers for each of those players.

Syr Carah, the Bold — ruling 2

Syr Carah's first ability triggers even if Syr Carah is dealt lethal damage at the same time that it or an instant or sorcery spell you control deals damage to a player.

Syr Carah, the Bold — ruling 3

Syr Carah doesn't change when you can cast the exiled card. For example, if you exile a sorcery card, you can cast it only during your main phase when the stack is empty. If you exile a land card, you can play it only during your main phase and only if you have an available land play remaining.

Syr Carah, the Bold — ruling 4

Playing an exiled card causes it to leave exile. You can't play it multiple times.

Syr Carah, the Bold — ruling 5

If you don't play the exiled card, it remains in exile.

Syr Carah, the Bold : règles, fonctionnement et interactions (MTG)

Syr Carah, the Bold is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Whenever Syr Carah or an instant or sorcery spell you control deals damage to a player, exile the top card of your library. You may play that card this turn. : Syr Carah deals 1 damage to any target.

How it works : Syr Carah, the Bold

Original English text — Wizards of the Coast / Scryfall

#1October 4, 2019· Wizards of the Coast
If Syr Carah or an instant or sorcery spell you control deals damage to two or more players at the same time, Syr Carah's first ability triggers for each of those players.
No other card is named in this ruling.
#2October 4, 2019· Wizards of the Coast
Syr Carah's first ability triggers even if Syr Carah is dealt lethal damage at the same time that it or an instant or sorcery spell you control deals damage to a player.
No other card is named in this ruling.
#3October 4, 2019· Wizards of the Coast
Syr Carah doesn't change when you can cast the exiled card. For example, if you exile a sorcery card, you can cast it only during your main phase when the stack is empty. If you exile a land card, you can play it only during your main phase and only if you have an available land play remaining.
No other card is named in this ruling.
#4October 4, 2019· Wizards of the Coast
Playing an exiled card causes it to leave exile. You can't play it multiple times.
No other card is named in this ruling.
#5October 4, 2019· Wizards of the Coast
If you don't play the exiled card, it remains in exile.
No other card is named in this ruling.